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MCP

ChatGPT

ChatGPT’s connectors run in OpenAI’s cloud, so they can’t see your computer directly. OpenAI’s official answer is the Secure MCP Tunnel: a small program from OpenAI that runs on your machine and relays ChatGPT securely to RhinoArtisan — outbound-only, nothing on your computer is ever exposed to the internet.

Fair warning: this is currently the most involved setup of all the clients, aimed at businesses and advanced users.

Shortcut: Codex uses your same ChatGPT account, connects to RhinoArtisan directly, and takes two minutes to set up.

You need: an OpenAI Platform account, plus a ChatGPT plan with developer mode — Business, Enterprise or Edu for the full experience (creating gems), Pro for read-only access. Web only for now.

Setup

  1. Install OpenAI’s tunnel-client (Windows, Mac and Docker builds available).
  2. Create a tunnel at platform.openai.com → Settings → Organization → Tunnels and generate an API key with Tunnels permission.
  3. Point the tunnel at RhinoArtisan and start it:
tunnel-client init --profile artisan --tunnel-id <your-tunnel-id> --mcp-server-url http://127.0.0.1:9280/mcp
tunnel-client run --profile artisan
  1. In ChatGPT (with developer mode enabled): Settings → Apps → Create, choose Connection: Tunnel and select your tunnel. ChatGPT scans RhinoArtisan’s tools and you can test right away.
  2. Keep tunnel-client run running while you work.

Try it

With Rhino open, ask ChatGPT:

“Create a round 1 ct diamond.”

The stone appears in your Rhino viewport. Not working? See Troubleshooting.